ulfborgkollegie.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.22.75.231 is hosted by Sinal A/S (AS39642) in Denmark. Mail is handled by mx1.pub.mailpod14-cph3.one.com, mx2.pub.mailpod14-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.22.75.231 | 3600s | — | AS39642 | Sinal A/S | 185.22.72.0/22 | 🇩🇰 Denmark | Viborg |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod14-cph3.one.com | 185.10.9.212 | mx1.pub.mailpod14-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod14-cph3.one.com | 185.10.9.213 | mx2.pub.mailpod14-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod14-cph3.one.com | 185.10.9.214 | mx3.pub.mailpod14-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod14-cph3.one.com | 185.10.9.215 | mx4.pub.mailpod14-cph3.one.com | AS51468 One.com A/S |
| www | 46.30.211.38 (AS51468) (address records, no CNAME) |
| www vs bare domain | Different networks (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.ulfborgkollegie.dk | 9W1YJljS1BtnuJ8zgAMlgweMUP9Xd3VFt0nm-mkPJC4 |
| TXT | _acme-challenge.ulfborgkollegie.dk | rI3HcZKulRoXFqkIzTmVsfePtoJqtJQ4F1D1muUf3Bk |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod14-cph3.one.com | DANE-EE · SPKI · SHA-256 | A4B9A2A35B513EFAC91F5A3C11DD0C58… |
| SMTP _25._tcp.mx2.pub.mailpod14-cph3.one.com | DANE-EE · SPKI · SHA-256 | A4B9A2A35B513EFAC91F5A3C11DD0C58… |
| SMTP _25._tcp.mx3.pub.mailpod14-cph3.one.com | DANE-EE · SPKI · SHA-256 | A4B9A2A35B513EFAC91F5A3C11DD0C58… |
| SMTP _25._tcp.mx4.pub.mailpod14-cph3.one.com | DANE-EE · SPKI · SHA-256 | A4B9A2A35B513EFAC91F5A3C11DD0C58… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026061302 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-14 14:59:05 | 456ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-08 08:10:37 | 579ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 22:18:34 | 556ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-15 01:57:42 | 633ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-26 09:16:42 | 4917ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-12 21:42:42 | 4236ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-04 12:25:17 | 1365ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-02 19:09:40 | 859ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-18 04:25:03 shown | 6994ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-14 19:37:32 | 4959ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-20 20:41:22 | 1111ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-20 18:07:20 | 1169ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 23:52:09 | 1532ms | 2 NS 1 A 4 MX | 🔒 Secure |